1. Before looking at the drawings, we need to read the design instructions, and then prepare the atlas of relevant standards and specifications before looking at the drawings, so as to understand the overall planning.

2. If it is a construction drawing, take the drawing to the site, calculate the axis distance in the drawing according to the relevant atlas prepared before, and then mark the important configuration with pens of other colors. In this way, we can distinguish the relationship between drawings and objects when we are at the scene. If some buildings are unclear, you can consult the construction personnel present and sort them out.

3. Look at the facility structure on the drawing, mark each code of the wall column and floor in sequence on the drawing, and then calculate the size proportional relationship with the drawing.

4. Comprehensively look at the plan, stereogram and profile of the construction site, and clearly mark the three-dimensional changes on the drawings according to the site settings. In this way, you can understand more than half of what is difficult to understand on the drawing.

5. Finally, check and accept, and mark the construction deficiencies on the drawings. In this way, we can easily understand a painting.